Swivel-jar wire-rope socket.



J. B. PRossER.. SWIVEL JAR wm: ROPE sGKET.

APPLICATION FILED MAY 2, 1912.- Lgggo Patented Dec.3,1912.

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TOHN EDWIN PROSSER, 0F TULSA, OKLAHOM, ASSIGNOR T0 PAUL ARBON, 0F TULSA,

` OKLAHOMA.

Specification of Letters Patent;

Patented nee. a, taie.v

Application filed May 2, 1912. Serial No. 694,725.

To all whom 'it may condom.'

Be it known that I, JOHN EDWIN Pnossnn, a citizen of the United States, residing at Tulsa, in the county of Tulsaand State of Oklahoma, have invented certain new' and useful Improvements in Swivel-Jar Wire- Rope Sockets, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to apparatus used for the drilling'y of deep wells and especially to apparatus for use in drilling oil wells.

e invention more particularly relates to a swivel jar for wire rope.

It is characteristic of what is known as the Downie swivel jar that the lower end of the barrel or cylinder in which the jar member operates is formed integral with a part or member corresponding to what is known as the subsocket, and hence thegjar member or piston must be inserted through the upper and open end of the barrel. This open end is closed` by a block screwing into the end of the barrel. This construction is objectionable as the block is quickly torn out by the blows imparted by the jar or piston, and also lfor the reason that this block must be removed whenever it becomes necessary to connect a new rope to the jar or piston. These objectionable features were overcome in the Brittan swivel, having the parts designed to receive the blows ofthe piston or swivel made inte al with the barrel .or cylinder, which has its lower end closed by the sub-socket screwing into. such lower end. In this construction this sub-socket must be removed in order to obtain access to the swivel for attaching a new rope or any other purpose. And further in both the Downie and Brittan constructions the swivel or jar member has been formed with a hollow st-em for the reception of the rope, said stem eX- tending up through the hollow stern of the barrel or cylindrical portion of the device, and in order that any air or foreign material which may enter the upper portion of the cylinder when the jar is down, can escape openings have been formed through the walls of the cylinder adjacent lto Aits upper end. It has been found in racticeV that openings suiicient in size an dimensions to permit of the escape of all air, etc., on

-the upward movement of the jar cannot be vformed through the walls of the cylinder without injuriously weakening 1t.

Thel inventiondescribed herein has for its object a construction of swivel jarliaving a hollow sub-socket formed integral with the barrellor cylinder, so as to permit of free access to the jar or piston when the swivel jar is detached from the drill stem. f

It is a. further object of the invention to provide for the free escape of the air, sand and water, etc., in the direction of movement of the jar. And it is a further object of the invention to provide for the maintenance of the rope from such contact with the stem of the body device, as will` cause injury during its movement through such stem.

The invention is hereinafter more fully described and claimed.- Y

In the accompanying drawings, like characters of reference indicate like parts in the several views, and Figure 1, is a side elevation of a swivel jar wire ro e socket constructed in accordance with t is invention; Fig. 2 is a side elevation taken at rivht angles to Fig. 1; Fig. 3 isa vertical ined1an'.

section through the socket; Fig. 4 is an enlarged detail side elevation of the part of they socket whereto the rope is secured, and Fig. 5 is an enlarged detail section showing the manner .in which the movable part contacts with the tool carrying portion of the device. I

This improved construction consistsk of two parts, which, for the sake of convenience, will be hereinafter tei-med the body or barrel yand the swivel o-r jar. The body or barrel comprises a cylindrical central portion 10 below which is a flattened surfaces 12 at diametrically opposite points for the reception of a wrench or other holding means. Below these flattened portions the socket is again formed as a cylinder 13, this latter being of uniform diameter. with the cylindrical portion 10. Above thel portion 10 of the body there is a frusto-coilc'al portionll and the upper end of the body. terminates in a cylindrical poi'- tion or stein 15 extending from the minor base of the frusto-conical portion Interinodiate its ends this cylindrical portion or stem 15 iSv-provided with rooves 16 cut therearo'uid'so that the bo y may be engaged by apropershing tool. Each end of the bodyfis referably beveled as at 17.

Extending.` fou' l1. the body is a bore. The central .pal't o .this bore extends from a point vsomewhatbelow the4 lower end of' ortion 11 having `portions 18 and of the portion 18 adjacent to its upper and lower ends.

The jar consists of a cylindrical body 24 of such size as to slidably lit within the portion 18 of the bore. The upper en d 25 of this jar is frusto-conical in form so that it fits snugly against the shoulder 21. Through this ar extends a bore, the upper portion of which is cylindrical in form, as indicated at 26 and is of less diameter than the bore 20 through the stem 15.

As the bore through the jar or piston is of less diameter than the bore 20 through the stem-15, and asthe upper end of the jar or piston is frusto-conical, the central portion of the jar or piston will be above the highest point of the piston striking against the shoulder on the body portion, and hence a substantial body of metal is interposed between the4 rope and the portion of the piston which will be liable to be upset in the drilling operation. The lower portion -of the bore in the jar is frusto-conical in form, as indicated at 27 for the reception of the clip or clips v28 used for securing the end of the wire rope 29. I

it is characteristic of my improved swivel jar, that any blows or other strains im-.

parted by the jar or piston is transmitted through an integral body of metal to the stem carrying the bit. FormerlyA when using wire rope, the latter was connected by a swivel consisting of two or more parts to the jarring links consisting of two parts and there in turn were connected directly or by a sub-socket to the stem carrying the bit. Later improvements have reduced the number of parts connecting the rope to the bit, by combining the swivel and ljarring links, but in such combined-structures, the

blows of the piston or jar have been transinitted/through threaded joints to the drill or bit/stem. As the drill stem and drill or bit have a 'combined weight of about three thousand pounds and as the weight-is raised bya blow of the piston or jar on some part ofthe barrel it will be readily understood that a threaded connection between such `barrel and the parts to be lifted would be case in practice.

as has been found the And further it is characteristic of this improved construction that it is formed of only two parts whichcanquickly destroyed,

' for well drillin readily be separated for attaching new ropes or any other purpose. bore portion 2O provides a guide for the rope 29 as the jar is moved up and down, the guide being sufficiently large so that under ordinary circumstances Vthe rope moves freely therein witho-ut any frictional engagement therewith. And further as the bore 2()C is materially larger transverselv than the rope and eXtends directly from the upper end of the bore 18 inl which the cylindrical jar operates, no air, liquid or other material can be pocketed between the upper end of t-lie cylindrical jar and the shoulders 21, and hence the jar can strike solidly against the shoulders 21.y

It will also be noted that by reason of the bevel on the shoulder 21 and the end of the jar` there will be no battering or upsetting of the shoulder by the end of the jar and by reason of the opening 2d being smaller than the bore 20 the upper end of the opening 26 cannot be forced in against the rope Furthermore, the4 by upsetting and thereby cutting in the rope at that point. lt will be observed that the diameter of the bore in the stem 15 is considerably greater than the external diameter of the rope, while the axial opening in the cylindrical jar is only slightly greater m j diameter than the rope. by this construe` tion the jar, whichis maintained centrally,

within the body portion, will hold the comparatively rigid rope centrally Within the stem.

l claim herein as my inventionz.

1. ln a two piece swiveling jarring device for well drilling apparatus, a body portion having a cylindrical bore extending with uniform diameter from its lower end and a rope guiding extensieifatlits upperL end and provided at the uppeifiiidofisaidfbore with an annular shouldetygt .vvallLfthe bore at the lower end being outwardlyfiiiclined and internally'threaded 'said-fshbiilder and lin- A..

ternally threaded portion being'formed in an integral-body of metal in combination with a 'cylindrical j ar or piston fitting loosely in the bore of the body portion, the jar or piston' and tion being made of such relative lengths as to afford such alength of movement to the jar or piston that a substantial blow or jar can be imparted to the body portion on the upward movement vof the piston. t

2; 1n a two piece swiveling j vg device apparatus, a' body portion having a cylin lrical bore' extendingwith uniform diameter from its lower end and provided at the upper end of said lbere with an annular shoulder and having a"`\hollow rope guiding extension at its upper nd, the bore of the extension being of the same diameter as the opening through theshoulder,

internally iio the bore in the body porill threaded at its lower end, the annular shoulder and internally threaded portion being formed in an integral body of metal,

means for securing a rope in such axial' opening, the jar o1' piston being made of suiieient length to maintainthe rope centrally in the guide extension and the bore in the body portion having such a length rela-A tive to the length of the jar or piston that the jar or piston will have suliieient stroke to impart a substantial blow or jar to the body portion on the llpward movement of the jar or piston.

3. In a wel] drilling apparatus, the combination of a body portion having a cylindrical bore and provided with a hollow stem having an internal diameter less than that of the bore in the body but greater than that of the rope to be employed, whereby a shoulder is formed at the junction of the stein and body portion, a cylindrical jar arranged 'in tlie bore of the body portion and having such an external diameter relative to the internal diameter of the bore that the axes of the body portion and jar may be maintained approximately in coxncidence, said jarhaving an axial opening 'if less diameter than that of the bore through the stein of the body portion and means Afor securing arope in said axial opening.

In testimony whereof l hereunto alix my signature in presence of two Witnesses.

JHN EDWIN lROSSlt.

Witnesses: I

E. R. PERRY, PAUL AnnoN. 

